The twin tip pack is great for color-coding jobs, as well as staff schedules, with just enough colored options (that you can see on white paper). Having both fine and ultrafine tips is also helpful for adding extra notes/detail.

The best marker to use in an office.... we use sharpie's all the time however when using the regular marker it bleeds through and is thick now we can use both ends so that it doesn't bleed through all of the paperwork and can still make certain items stand out to the person you are giving it to.